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JIC Thread Sizes Sizes (SAE J514, 37° Flare)

Commonly referred to as 37° JIC, this connection is widely used in hydraulic systems. When the straight threads are engaged, the 37° male seat seals on the 37° female flare seat. Most thread sizes are identical to the 45° SAE connection as noted (*) below. Care must be taken not to confuse these two connectors, which have different seat angles.

Dash Size	Inch Size	Thread Size	Male Thread (O.D)	Female Thread (I.D.)
2	1/8"	1/8-27*	.31	.27
3	3/16"	3/8-24*	.38	.34
4	1/4"	7/16-20*	.44	.39
5	5/16"	1/2-20*	.5	.45
6	3/8"	9/6-18*	.56	.51
8	1/2"	3/4-16*	.75	.67
10	5/8"	7/8-14*	.88	.8
12	3/4"	3/4-14	1.06	.98
14	7/8"	1 3/16-12	1.18	1.09
16	1"	1 5/16-12	1.31	1.22
20	1 1/4"	1 5/8-12	1.63	1.54
24	1 1/2"	1 7/8-12	1.88	1.79
32	2"	2.5-12	2.5	2.41